My mom loves embarrassing me

My mom is unbelievable lol I'm 15 almost 16 and my boyfriend is 19, I was a late bloomer I started my period a couple months ago and my mom has to share the whole thing to him and said that he needs to take care of me when I have cramps and to be careful when I'm PMSing and shares all my embarrassing moments when I was little so mean lol.

But my boyfriend is so sweet, while I'm red in the face from embarrassment he just hugs me laughing saying it's ok, I know it's normal, I still love you and always will. why do mom's embarrass you so much lol